Rotating shelf structure for showcase

ABSTRACT

Disclosed is a rotating shelf structure for a showcase, which is positioned in the showcase casing and is adapted to allow easy supplementation, from the outside, of a sold product by rotating a shelf that has products placed on display thereon such that a first-in first-out arrangement is possible, and which additionally minimises the weight of the shelf itself while being durable and involves a structure allowing smooth cold-air circulation while the rotation is also smooth. The shelf structure of the present invention comprises: a base plate on which is formed a blocking wall for preventing, inter alia, the inflow of extraneous material and the like; a pillar frame which is formed split between a first pillar and a second pillar in order to minimise weight and also for reduction of raw materials and ease of assembly, and is formed so as to have cut-away parts for assembly; a lower plate and an upper plate formed so as to have insertion recesses so as to join to the upper and lower ends of the pillar frame; a securing member wherein the upper part of a support is opened so as to easily axially support and join the upper plate; and a display tray which is arranged so as to be assembled after having been formed split in such a way as to be able to carry a roller member for displaying products while having joined thereto securing pins hooking at either end into securing recesses formed in the first pillar and securing recesses formed in the second pillar of the pillar frame, and which is improved in such a way as to be able to minimise weight, allow smooth cold-air circulation and avoid contact with cabinet wall surfaces during rotation.

TECHNICAL FIELD

The present invention relates to the rotating shelf structure of ashowcase in which goods sold are conveniently replaced on the basis ofthe first-in first-out arrangement with outside ones by rotating a goodsdisplay shelf. More specifically, the present invention relates to therotating shelf structure of a showcase, which is characteristic in thatthe structure is renovated to provide the durability, easy assembling,manufacturing cost reduction, and smooth circulation of cold air whileminimizing the total shelf weight.

BACKGROUND TECHNOLOGY OF INVENTION

In general, on the shelves of refrigerating and freezing showcasesinstalled at supermarkets (convenience stores), a variety of goods aredisplayed in multi layers so that purchasers may identify and selectthem with convenience. In order to display more goods, it is possible toadjust the height and gap of the shelf. In a conventional reach-in-typeshowcase, opening/closing doors are installed for easy carry-in andtake-out at the front of the box-form cabinet and many shelves areplaced to load a lot of goods inside the cabinet. In the said showcase,many installation grooves are formed horizontally for attachment ofbrackets on the left and right side walls inside the cabinet, and bothends of the shelf are fixed into bracket installation grooves directlyor by using clips to load goods such as a variety of foods and drinks.

In case the said shelf is fixed horizontally, however, the goods placedin the front may be easily identified by consumers, but the ones placedaway from the front should be taken out and confirmed, one by one, byconsumers, which causes inconveniences. In addition, due to its state ofbeing fixed, the said shelf has a problem that it has limitation indisplaying the goods placed away from the front, which due to lack ofthe first-in first-out arrangement, should be moved, one by one, by amanager to the front empty space created by sale of the previous goods.

In order to solve the problem of the said conventional fixed-type shelf,proposed is a rotating-type shelf which can change the position of goodsdisplayed on the showcase shelf. The said rotating-type shelf wasdisclosed in Korean Utility Model Registration Application No.20-1997-0020218 (“Free Rotating-Type Shelf Structure of Showcases”),Korean Utility Model Registration Application No.20-1997-0020227(“Rotating-Type Shelf of Showcases”), Korean Patent Application No.10-1997-0035897 (“Rotating-Type Shelf Structure of Showcases”), andKorean Patent Application No. 10-1997-0017474 (“Drive Equipment forRotating Shelf of Showcases”). The said shelf structure is a type withmany horizontal circular plates installed to load goods around thecentral axis, and the goods to be selected reaches the opening positionof the door by rotating the circular plates round the central axis bymeans of an artificial force or a drive motor. The said rotating shelfis horizontal and cannot utilize the first-in first-out arrangement. Italso has an inconvenient problem that the circular plates should berotated for selection of goods directly by consumes.

In addition, in order to solve the problem of the said horizontal shelf,the shelf is inclined with a small angle so that goods may always arriveat the tip on the basis of the first-in first-out arrangement for theireasy identification and selection by purchasers. In other word, the nextitem slides down toward the tip due to the slope of the shelf, if thepurchasers take out an item displayed on the tip of the shelf, The saidconventional inclined shelf has an advantage that goods slide downsmoothly for smooth movement of the next item displayed to the space ofthe initial item selected on the basis of the first-in first-outarrangement so that they may be easily identified by consumers. Since itis fixed, however, the said conventional inclined shelf has a problemthat a large inflow space whose position is higher than that of thegoods placed on the tip is required to supplement goods and so it isdifficult to provide a large display space of goods because the gapbetween display spaces is large. In order to alleviate the said problem,a display space may be provided at the rear of the shelf while theheight gap between the shelves is minimized. However, this approach alsohas a problem that due to the increase in unnecessary spaces, moresupply of cooling air is required, which is uneconomical, and theinstallation place is limited since the cabinet size increases.

Meanwhile, in order to solve the said problem, the applicant of thepresent invention first applied for and registered Korean PatentApplication No. 10-2010-0017175 (Registration No. 10-1089752)‘Rotating-Type Self Structure of Showcases’. The said rotating-typeshelf structure of the showcase (1) is composed, as shown in AttachedFIG. 1 (Disassembled Perspective Drawing of Rotating-Type ShelfStructure) and FIG. 2 (Approximate Cross Section of Showcase Equippedwith Rotating-Type Shelf Structure), of the cabinet (11), which providesa space for display at refrigerating and freezing states, the door (12),which opens/closes the opening part for display and sale of goods, andthe rotating-type shelf structure 100) installed to rotate in order todisplay and take out goods on the basis of the first-in first-outarrangement.

A detailed examination of the said rotating-type shelf structure (100)indicates that it is composed of the base plate (2), which is fixed onthe floor inside the cabinet (11) and equipped with the bottom axis (21)at the center, the bottom plate (3) with

form on which the bushing (31) inserted into the bottom axis (21) of thebase plate (2) is installed, many ball castors (32) are installed at thebottom, the pillar frame (4) wherein many first fixing groove (41) andsecond fixing grooves (42) with hitch spot (42″) are formed inequidistant intervals in pairs to insert the both ends into the saidbottom plate (3), the top plate (5) on which the bushing (51) isinstalled at the central top contacting the both ends of the said pillarframe (4) and the boundary part is bended in the perpendiculardirection, the fixing member (6) wherein the upper part of supports (63)includes the fixing plate (62) equipped with the top axis (61) which isinserted into the bushing (51) fixed to the said upper plate (5) can beconnected after being inserted to the both ends of the fixing plate (62)to fix the horizontal part (63 a) and to fix the vertical part (63 b) onthe walls of internal both sides of the cabinet (11), and the displayframe (7) which has in the front and rear direction the cover (71) whichmaintains the state of penetrating the both ends of fixing pin (72) ofwhich both ends are hooked to the first fixing groove (41) and thesecond fixing groove (42) of the sand pillar frame (4) and wherein theboundary part are vertically bent. And the said display frame (7)consists of polygons with a form of

whose front corner part, when rotating, locates the center of rotationin front so that it may not touch the cabinet (11) wall and whose rearcorner part is corner-cut so that it may rotate without contacting thecabinet (11) wall.

The said rotating-type shelf structure of showcases can make the bestuse of the inner space of the cabinet by locating in front the center ofrotation of the display frame in which goods are displayed for thefirst-in first-out arrangement and by corner-cutting and rotating therear of the display frame, enable the first-in first-out arrangement byrotating the rear position of the display frame to the opening positionafter opening the door and supplementing goods conveniently from theoutside, can make the rotation smooth by bending/forming/assemblingdurable metal plate. and can reduce the loss of cooling air byminimizing the cabinet space.

However, the said rotating-type shelf structure of showcases not onlyhas an excessive weight due to the pillar frame, which supports thevertical load transmitted from the goods and shelf, and the structuralcharacteristics of the display frame on which goods are displayed, butalso requires a large artificial force action for shelf rotation, has adifficulty in smooth rotation due to inflow of foreign substances toball castors, and has a difficult problem of assembling due tostructural characteristics of the fixed member.

CONTENTS OF INVENTION Task to be Solved

Thus, the present invention has resolved the conventional problemsdescribed above in detail and improved the rotating-type shelf structureof showcases first applied by the applicant(s) of the present invention.The objective of the present invention is to provide a very economicalrotating-type shelf structure of showcases which can rotate many displayframes of goods so that the first-in first-out arrangement may bepossible by supplementing goods from the outside after opening the door,makes convenient the procedures of assembling many light-weight goodsdisplay frames for smooth circulation of cooling air, improves thestructure of top and bottom plates mutually connected to increase thedurability by making the pillar frame disassemblable and light, achievesa smooth rotation by preventing the inflow of foreign substances to ballcastors, makes the installation and replacement of the fixed memberconvenient by improving its structure, and maximizes the efficiency byminimizing the internal space of the cabinet.

In addition, the objective of the present invention is also to provide arotating-type shelf structure of showcases which makes the installationand disassembling of the display frame more convenient.

Means for Solution of Task

The present invention for achievement of the said objective is therotating-type shelf structure of showcases improved from the technologyfirst applied by the applicant of the present invention. The presentinvention is technically characteristic in that since it is composed ofthe base plated improved to prevent the inflow of foreign substances,the pillar frame separately formed in No. 1 pillar and No. 2 pillar tominimize the weight, reduce the cost of raw materials, and makeassembling convenient, the bottom and top plates improved forcombination with the top and bottom of the pillar frame, the fixedmember improved for convenient axial support of and combination with thesaid top plate. Because the present invention is comprised of thestructure to form split so as to place the roller members displayinggoods while integrating the fixing pins of which both ends are hooked tothe fixing grooves which are formed on the first pillar and secondpillar, it minimizes the weight, enables a smooth circulation of coolingair, and contains the display frames improved to prevent the contactwith the cabinet wall during the rotation.

In addition, the objective of the present invention is technicallycharacteristic in that the display frame is not installed with fixingpins but can be conveniently installed to and separated from the pillarframe by using clips.

Effects of Invention

According to the present invention, the display frame in which goods aredisplayed for the first-in first -out arrangement is composed, formutual assembling, of the front frame, ear frame, and guide plateextrusion-molded with aluminum with a low specific gravity. Thisinvention can reduce the weight by constituting with a rear plate whichhas a multi-side shape as well as promote the circulation of cool air.It also can form splitting the pillar frame into the first pillar andthe second pillar excluding the intermediate connection parts and reducethe weight by improving the integrating structure of bottom plate andtop plate integrated to the bottom and top ends although maintaining theruggedness. This invention is very feasible in the profitability,because it prevents foreign materials from inducing to the ball castorsand enables the smooth rotation due to the improvement of the baseplate, enables easy installation and replacement due to improving thefixing members and finally minimizing the internal space of the cabinet.

In addition, the present invention is very convenient since it ispossible to install the display frame with a simple action that theinsertion groove drilled on the bottom floor of the display frameinserted to the bump of the clip combined with the pillar frame and itis possible to separate the display frame with an action of raising it.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows the disassembled perspective drawing for the rotating-typeshelf structure of conventional showcases.

FIG. 2 shows the cross-sectional drawing for the installed state of therotating-type shelf structure in FIG. 1 a part of which is omitted.

FIG. 3 shows the disassembled perspective drawing for the rotating-typeshelf structure of showcases based on the present invention.

FIG. 4 shows the cross-sectional drawing for the installed state of therotating-type shelf structure in FIG. 3 a part of which is omitted.

FIG. 5 shows the expanded perspective drawing for the combined state ofthe top plate and pillar member out of the rotating-type shelf structureof showcases based on the present invention.

FIG. 6 shows the disassembled perspective drawing of the display frameout of the rotating-type shelf structure of showcases based on thepresent invention.

FIGS. 7 a and 7 b show the perspective drawing and combinedcross-sectional drawing, respectively, for the combined state of thedisplay frame out of the rotating-type shelf structure of showcasesbased on the present invention.

FIG. 8 shows the cross-sectional drawing for the state that therotating-type shelf structure of showcases based on the presentinvention rotates inside the cabinet.

FIGS. 9 a and 9 b show the disassembled perspective drawing and combinedcross-sectional drawing, respectively, for other examples of the displayframe out of the rotating-type shelf structure of showcases based on thepresent invention.

FIG. 10 shoes the disassembled perspective drawing for another exampleof the display frame out of the rotating-type shelf structure ofshowcases based on the present invention.

DESCRIPTION OF SIGNS

-   1: Showcase 11: Cabinet-   12: Door 2: Base Plate-   21: Bottom Axis 3: Bottom Plate-   31: Bushing 32: Ball Castor-   4: Pillar Frame 4 a: No. 1 Pillar-   4 b: No.2 Pillar 41, 42: Fixing Grooves-   41′: Cut Part 42′: Cut Part-   5: Top Plate 51: Bushing-   6: Fixing Member 61: Top Axis-   7: Display Frame 8′: Roller Member

DETAILED CONTENTS FOR IMPLEMENTATION OF INVENTION

Hereunder, to the same parts as the signs given in the conventionaltechnology of FIGS. 1 and 2, the same signs are given. In reference toattached FIGS. 3 through 10, the desirable examples of the presentinvention are described in detail.

FIG. 3 and FIG. 4 show the disassembled perspective drawing and thecross-sectional drawing of the showcase-installed state, respectively,for the rotating-type shelf structure of showcases based on examples ofthe present invention. Sign 1 represents the showcase, 11 the cabinet,12 the door, and 100 the rotating-type shelf structure.

Ordinarily, the showcase (1) consists of the cabinet (11), whichprovides a space for display and sale of goods at refrigerating andfreezing conditions, and the door (12), which opens/closes the openingpart for display and sale of goods. Cooling air is sullied to the insideof the cabinet (11) from an non-diagrammed freezing system.

And inside the said showcase (1), installed for rotation is the shelfstructure (100) in which placed are many display frames (7) inclined todisplay goods on the basis of the first-in first-out arrangement insidethe cabinet (11) of the said showcase (1).

The goal of the shelf structure (100), the improved feature technologyof the present invention, is to provide a convenient assembling,maintain the durability, reduce the cost, and provide free rotationwhile minimizing the load. In order to accomplish this goal, metalplates with the thickness ranging from 1 mm to 4 mm are used, bended,assembled, and disassembled to increase the durability, and the displayframe (7) improves the assembling structure by changing the material toreduce the weight and provide a smooth circulation of cooling air.

The shelf structure (100) of the present invention is composed, as shownin FIGS. 3 and 4, of the base plate (2), which is fixed to the internalfloor and wall of the cabinet (11) and supports the central axis ofrotation, the fixing member (6), the bottom plate (3) and top plate (5)for formation of the center of rotation, the pillar frame (4) for fixingof the said bottom plate (3) and top plate (5) to the top and bottomends, and many display frame (7) combined with the said pillar frame (4)to display goods. These are combined by ordinary fixing bolts andtightening screws.

The base plate (2) supports the total load of the shelf structure (100)and the weight of displayed goods, is fixed on the internal floor of thecabinet (11) by tightening screws, and the bottom axis (21) is installedto the center. The said bottom axis (21) is the central axis forrotation of the shelf structure (100). Especially, the base plate (2) isformed into a circular plate along the rotational radius of the bottomplate (3) to make no hitches when the bottom plate (3) rotates and theborder of this circular plate is bended vertically to form the barrier(22).

The bottom plate (3) is inserted into the bottom axis (21) of the baseplate (2) and the bushing (31) is installed for smooth rotation to thebottom center of the bottom plate (3). In order to make the rotationmore smooth and support the load, many ball castors (32) are installedaround the bottom and the boundary part is bended in the perpendiculardirection to form into the form of

with a narrow width on both sides. In addition, the bottom plate (3) isconstructed together with the base plate (2) to support the entire loadof the shelf structure (100) and the weight of displayed goods.

The bushing (51) is installed to the top center of the top plate (5) andthe boundary part is bended in the perpendicular direction to increasethe durability.

Meanwhile, the insertion groove (33) and insertion groove (52) aredrilled in the front and at the rear, respectively, so that No. 1 pillarand No. 2 pillar of the pillar frame (4), which are formed in divisionon the bottom plate (3) and the top plate (5), may be inserted into eachinsertion groove.

The pillar frame (4) is fixed to both ends of the bottom plate (3) andthe top plate (5) to form frames on left and right sides in a group, andeach pillar frame (4) is formed in division into No. 1 pillar (4 a) andNo. 2 pillar (4 b), which have no connecting parts to minimize theweight and reduce the cost, and then is connected to the front and rearcorner parts on each side of the bottom plate (3) and top plate (5).

The said No. 1 pillar (4 a) and No. 2 pillar (4 b) are formed in bendingin the

shape in order to increase the durability. The cut parts (41′, 42′) areformed to insert the top and bottom ends into the insertion groove (33)of the bottom plate (3) and the insertion groove (52) of the top plate(5), and many fixing grooves (41, 42) are formed in an equal interval inthe vertical direction to fix the display frame (7) to many spots of anequal interval. In reference to FIG. 4, the said fixing groove (41) andfixing groove (42) are the spots for insertion of fixing pins (72) tofix the display frame (7). The said fixing groove (41) plays a role ofpreventing the display frame (7) from being pushed to the front byopening the inside of the cabinet (11) and closing the door (12) side,and the said fixing groove (42) plays a role of preventing the displayframe (7) from being pushed to the front by opening the inside of thecabinet (11) to form the hitch spot (42″) and closing the door (12)side. In addition, the hitch spot (42″) of the said fixing groove (42)prevents the display frame (7) from being pushed to the rear and brokenaway. In addition, if the reinforcing angle (43) on the bottom innerside of the No. 1 pillar (4 a) and No. 2 pillar (4 b) of the pillarframe (4) is fixed by spot welding or the fixing bolt, the reinforcingangle (43) is placed at the top of the bottom plate (3), which increasesthe stability by dispersing the load transmitted to the pillar frame (4)to the top of the bottom plate (3), not concentrating it only to thefixing bolt.

The fixing member (6) fixes to the internal wall of the cabinet (11) thetop axis (61) inserted into the bushing (51) installed on the top plate(5) and adjusts the perpendicular state of the said pillar frame (4)while maintaining the center position for rotation of the shelfstructure (100). In other words, in order to make a convenientadjustment of the perpendicular state of the pillar frame (4), thefixing member (6) is composed of the fixing plate (62), which fix thetop axis (61), and a group of supports (63) whose vertical part (63 b)is fixed in contact with both walls of the cabinet (11) while thehorizontal part (63 a) is fixed in insertion into both ends of the saidfixing plate (62). The long hole drilled into the horizontal part (63 a)of the said support (63) compensates for the distance which variesdepending on the gap between both walls during tightening of the fixingbolts, and the long hole drilled into the vertical part (63 b) of thesaid support (63) fixes the top axis (61) of the said support (63) onthe wall of the cabinet (11) while providing a upward/downward driftspace for its convenient insertion into the bushing (51) of the topplate (5). Especially, it is desirable to compose the structure so thatthe fixing plate (62) descends from the top side so that the upper axis(61) be integrated to the bushing (51) as the imaginary line shown inthe FIG. 4 by forming the top part of the support (63) in the open stateso as to be convenient for inserting the fixing plate (62) in thecondition that the said support (63) is fixed to the wall surface.

As shown in FIG. 1, the display frame (7) for display of goods consistsof the fixing plate (72), front frame (73), rear frame (74), guide plate975), support frame (76) and rear plate (77), forming a polygon with theform of

to display goods on the roller member (8′). The said fixing plate (72)is combined in insertion into the fixing groove (41) of No. 1 pillar (4a) and the fixing groove (42) of No. 2 pillar (4 b) for the pillar frame(4). Both ends of the fixing plate (72) is combined at an exposed statewith the front frame (73) and the rear frame (74). The said guide plate(75) is fixed to/combined with the front frame (73) and the rear frame(74) while maintaining a certain gap with them and forms the verticalwall (75) to prevent goods from breaking away. The said support frame(76) is fixed to/combined with the middle of the guide plate (75). Thesaid rear plate (77) is placed at the rear of the display frame (7) inthe corner cut form of a rectangular rear so that it may not contact thewall of the cabinet (11) during rotation of the display frame (7). Inorder to make the center of rotation inclined to the front withoutcontact of the corner of the front frame (73) with the wall of thecabinet (11) during rotation of the display frame (7), the slope of thesaid display frame fixed to the said rear frame is determined by theheight of the fixing groove (41) and the fixing groove (42) formed atNo. 1 pillar (4 a) and No. 2 pillar (4 b) of the pillar frame (4) towhich many display frames (7) may be installed, and the slope ordinarilyranges from ∠3 to 10°.

In order to reduce the weight of the said display frame (7) and providea smooth circulation of cooling air, the front frame (73), rear frame(74), guide frame plate (75), and support frame (76) areextrusion=molded with aluminum with a low specific gravity. In order toincrease the durability and reduce the weight, as shown in FIGS. 7 a and7 b, the part which the roller member (8′) is inserted into and the partwhich a series of rear plates (77) are inserted into are opened, andother parts which the fixing plate (72) is inserted into are formed inthe form of a pipe.

And in the said display frame (7), as shown in FIG. 7 b, installed isthe guide (81) to divide displayed goods. The use of the roller member(8′) which many rotating-type rollers (83) are installed to enabledivision of each kind of goods and make the first-in first-outarrangement easy for each kind of goods.

In addition, as shown in FIGS. 9 a and 9 b, the display frame (7) of thepresent invention may be assembled of the front frame (73), the rearframe (74), guide plate (75), support frame (76), and roller member(8′), excluding the rear plate (77). In case the said rear plate (77) isexcluded, since the number of initially displayed goods is identical, itis convenient to check the number of sold items for each kind of goods.

In addition, in the present invention, as shown in FIG. 10, as a methodnot to use the said fixing plate (72), it is possible to compose thedisplay frame (7) without using the rear frame (77) by combining thehitch groove (752) drilled on the bottom surface of the guide plate (75)of the said display frame (7), with the bump (91) of clip (9) fixed tothe fixing grooves (41, 42) formed at No. 1 pillar 4 a) and No. 2 pillar(4 b) of the said pillar frame (4).

The unexplained sign of 78 in the figures is a finishing member insertedinto the rear of ordinary roller members (8′) placed on the displayframe (7), and 731 is a display part formed as bump in the front frame(73) to insert goods names or price tables.

Next, described are the installation and operation for the rotating-typeshelf structure of showcases in the present invention made as explainedabove.

The base plate (2), fixing member (6), several display frames fordisplay of goods (7), bottom plate (3), pillar frame (4), and top plate(5) are separately prepared and then mutually combined to form the shelfstructure (100) for installation inside the cabinet of (11) of showcases(1).

First of all, the base plate (2) on which the bottom axis (21) isinstalled is fixed on the floor of the cabinet (11) by tighteningscrews, but as shown in FIGS. 3 and 4, the center of the bottom axis(21) is set slightly in the floor front of the cabinet (11), not thefloor center. In other words, the center of rotation is set so that thefront and rear corner parts of the display frame (7) may not contact thewall and door (12) of the cabinet (11) during rotation of the displayframe to be installed on the top of the said bottom axis (21).

Next, the support (63) of the fixing member (6) is installed beneath theceiling part of the cabinet (11) responding to the bottom axis (21) ofthe said base plate (2). The vertical part (63 b) of the support (63)for combination of both ends of the fixing plate (62) is fixed on thewall of the cabinet (11) by fixing bolts so that the top axis (61) maybe located at the same position of vertical direction as the bottom axis(21) of the base plate (2) on which the support (63) of the said fixingmember (6) is installed. At this time, the fixing plate (72) on whichthe top axis (61) is installed shall be on stand-by for postinstallation.

Next, assembled is the rotating-type shelf structure (100) rotating todisplay goods for sale by changing the front and rear positions of theseveral display frames (7). The bottom plate (3), pillar frame (4), andtop plate (5) of the said shelf structure (100) are mutually combined byfixing bolts, fixing nuts, and tightening screws. On the said bottomplate (3), the bushing (31) is fixed and ball castors (32) are installedaround. On the top plate (5), the bushing (51) is fixed. Assembling iscompleted by tightening at the said basic assembling conditions withfixing bolts and nuts the bottom plate (3) and top plate (5) to the topand bottom parts of No. 1 pillar (4 a) and No. 2 pillar (4 b) of thepillar frame which are composed in groups. For convenience of work, thesaid nuts are already fixed through welding on the bottom plate (3) andtop plate (5).

In other words, in case the said bottom plate (3) and top plate (5) arecombined with No. 1 pillar (4 a) and Np. 2 pillar (4 b) of the pillarframe (4), as shown in FIG. 5, the vertical parts of the bottom plate(3) and top Plate (5) are inserted in line into the cut parts (41′, 42′)of No. 1 pillar (4 a) and No. 2 pillar (4 b), and No. 1 pillar (4 a) andNo. 2 pillar(4b) are inserted in penetration into the insertion grooves(33, 52) drilled on the bottom plate (3) and top Plate (5). Each cornerpart of the said bottom plate (3) and top Plate (5) and each bended partof No. 1 pillar (4 a) and No. 2 pillar (4 b) are adhered, mutuallycombined, and then tightened for a strong assembling by fixing bolts.

Next, the reinforcing angle (43) is fixed to the inner bottom of No. 1pillar (4 a) and No. 2 pillar (4 b) for the pillar frame (4) by spotwelding or fixing bolts, and the bottom of the angle (43) contacts thetop of the bottom plate (3) for transmission of the load.

Next, when a frame is made by mutually combining the said bottom plate(3), pillar frame (4) and top plate (4), the bushing (31) fixed to thebottom plate (3) is first inserted in line into the bottom axis (21) ofthe base plate (2) fixed on the floor of the cabinet (1) to contact, asshown in FIG. 4, the ball castors (32) fixed on the bottom plate (3)with the top of the base plate (2) and position the bushing (51) fixedon the said top plate (5) at the bottom of the fixing member (6).

In the above mentioned state, if the vertical part (63 b) of above saidsupport materials (63) is integrated to the wall of the cabinet (11)with fixing bolts after descending down the fixing plate (62) of thefixing member (6) from the top side of the support (61) of which the toppart is opened as shown in the FIG. 4 so that the top axis (61) fixed tothe fixing plate (62) can be inserted to the bushing (51) of the topplate (5) to mutually be integrated, and then fixing the fixing plate(51) to the horizontal part (63 a) of the support (63) with fixingbolts, the top axis (61) will take a role of central axis of rotation ofintegrated bushing (51).

The rotating-type shelf structure 100) integrated by mutually combiningthe said bottom plate (3), pillar frame (4) and top plate (4) rotatesaround the bottom axis (21) of the base plate (2) and the top axis (61)of the fixing member (6). The rotation gets smooth since the ball castor(32) installed on the bottom plate (3) disperses the weight of the shelfstructure and the displayed goods.

Next, the guide plate (75) of the display frame (7) is assembled at bothends by tightening screws to maintain a certain gap with theextrusion-molded front frame (73), rear frame (74), and support frame(76). The display frame unit (7) is assembled, as shown in shown in FIG.8, by installing the rear plate (77) to the rear frame (74) and theroller member (8′) to the top.

As a next step, if the both ends of the fixing pin (72) inserted to therear frame (74) are inserted into the fixing grooves (42) which areformed on the second pillar (4 b) and placed on while the fixing pin(72) inserted to the front frame (73) of the display frame (7) is beinginserted to the fixing groove (41) which is formed on the first pillar(4 a) of the pillar frame (4) in the condition that the fixing pin (72)is inserted to the front frame (73) and the rear frame (74) of the unitdisplay frame (7) as described above , they are protected from beingpushed to the rear direction by the hitch spot (42″) and installedinclined in a stable manner as shown in FIG. 4. Through above mentionedrepeated process, a multiple display frames (7) can be installed forapplication with a certain intervals appropriate for withdrawal andsupplement of goods.

The rotating type shelf structure (100) assembled as explain aboverotates, as shown in FIG. 8, on the basis of the center of rotationmoved toward the door (12) rather than the floor center while thecorner-cut part located on the rear plate (77) of the display frame (7)not contacting the wall of the cabinet (11). It is possible to make aneasy supplementation of sold goods from the outside by positioning thesaid rotating display frame (7) to the door (12).

For this reason, the rotating type shelf structure (100) excludes thepart connecting with the pillar frame (4) which forms splitting into thefirst pillar (4 a) and the second pillar (4 b), and reduction in weightenables smooth rotation and in turn, reduction in the cost of rawmaterials. The said structure enables to prevent twisting anddeformation through mutual insertion assembling of insertion grooves(33,52) which are formed on the lower plate (3) and the upper plate (5)and cutting parts (41″, 42′) which are formed on the first pillar (4 a)and the second pillar (4 b). As the results, the durability can bemaintained, and the weight of display frame (7) comprising of variousextruded formed parts can be reduced, which enables the circulation ofcool air efficient and maintenance of freshness of goods. In addition,opening the upper part of support (63) of the fixing member (6)encourages the easy assembly and disassembly of the fixing plate (62)and the barrier (22) which forms on the base plate (w) prevents foreignmaterials or drinking water flowing into the ball castors (32) and thebottom axis (21) to enable smooth rotation always.

In addition, as shown in FIG. 9 a, it may be possible to use the displayframe excluding the rear plate (77). In case the said rear frame (77) isnot available, since the number of initially-displayed goods isunchanged, it is possible to check fast the number of sold goods throughthe empty space created by the sale or the number of left-overs.

In addition, as shown in FIG. 10, in the present invention, it ispossible to provide the convenience of fixing, hoisting, and separating,excluding the rear plate (77), by combining the hitch groove (75 e)formed on the bottom of the guide plate (75) of the display frame (7),with the bump of the clip (9) fixed in insertion to the fixing grooves(41, 42) formed on No. 1 pillar (4 a) and No. 2 pillar (4 b) of thepillar frame (4)

As explained above, the desirable examples of the present invention aredescribed and shown by figures, but the present invention is not limitedonly to what is described and shown by figures. Therefore, since thepersons in the field are well aware of appropriate changes andmodifications of the said examples, the appropriate changes andmodifications, and their equivalents should be considered to belong tothe scope of the present invention.

1. A rotating-type shelf structure of showcases in which installed forrotation are a cabinet (11) to provide a space to display goods atrefrigerating and freezing conditions, a showcase (1) equipped with adoor (12) to open/close the opening part for display and sale of goods,and a shelf structure (100) to enable the first-in first-out of goodsdisplayed inside the cabinet (11) of the showcase (1), in which theshelf structure (100) contains; a base plate (2) to form a barrier (22)by installing at a center a bottom axis (21) fixed on the floor insidethe cabinet (11) and bending in the vertical direction the boundary partin a circular form, a bottom plate (3) with

form on which a bushing (31) inserted into the bottom axis (21) of thebase plate (2) is installed, a plurality of ball castors (32) areinstalled at the bottom to assist in the rotation, the boundary part isbended in the perpendicular direction, and an insertion grooves (33) aredrilled at the front and rear of both ends, a top plate (5) on which abushing (51) is installed at the top in response to the bottom plate(3), the boundary part is bended in the perpendicular direction, and theinsertion grooves (33) are drilled at the front and rear of both ends, apillar frame (4) which forms the a plurality of cut parts (41′, 42′) toinsert the bottom and bottom ends into the insertion groove (33) of thebottom plate (3) and the insertion groove (52) of the top plate (5),divides into No. 1 pillar (4 a) and No. 2 pillar (4 b) bended in

form while forming a plurality of fixing grooves (41, 42) in thevertical direction, and both ends of the bottom plate (3) and top plate(5) are fixed at the top and bottom parts, a fixing member (6) whereinan upper part of supports (63) is opened so that a fixing plate (62)equipped with a top axis (61) which is inserted into the bushing (51)fixed to the upper plate (5) can be connected after being inserted tothe upper part of the upper part of supports (63) which is split so asto fix on the walls of both sides of the cabinet (11), a display frame(7) which has the polygonal shape so as to display the goods by mountinga roller member (8′) and is comprised of; a fixing plate (72) both endsof which to the fixing grooves (41, 42) formed at No. 1 pillar 4 a) andNo. 2 pillar (4 b) of the pillar frame (4), a front frame (73) and arear frame (74) both ends of which are exposed by inserting the fixingplate (72), a guide plate (75) which fixes the front frame (73) and therear frame (74) while maintaining the gap with them and has a verticalwall (751) to prevent goods from breaking away, a support frame (76)which is fixed in a middle of the guide plate (75), and a corner-cutrear plate (77) which leans forward the center of rotation so that thecorner of the front frame (73) may not contact the wall of the cabinetduring the rotation while it fixes to the rear frame (74) so as torotate without contacting the wall of the cabinet.
 2. The rotating-typeshelf structure of showcases according to claim 1, wherein the displayframe (7) is constructed without using the rear frame (77) by combininga hitch groove (752) drilled on the bottom surface of the guide plate(75) of the display frame (7), with the bump (91) of a clip (9) fixed tothe fixing grooves (41, 42) formed at No. 1 pillar 4 a) and No. 2 pillar(4 b) of the pillar frame (4).